Attachment for teeth



July 6,1926. l1,591,156

' J. M. CRAIGO ATTACHMENT FOR TEETH Filed Augufst 5, 1925 f" Ag/.4. 2f v Snowdon Patented `July 1 6, 1926.

' 'i AMACHMNT, FOREQ This inventionfI 'elatesA "to `means for 'attaching artificial liridgesjl plates,V dentures,- or othery orthodimtia appliancesto p'ermatures of novelty and'v advantage 'and which lll ao i applied to vanyof'the permanent'teeth in ythe is p1articular lyY oharaeterized ,byfit's extreme .siinplieityin eonstruetion7 theease 'and jaoill itywith which it may be'eonstr'uoted and applied; and its eieetiveness'in inse."

A'more particular aiin'ofl the invention'is to provide an'improved attachment hy means of which thev dent'ur'eor' bridge workmaylbe held in proper relation to the permanent Afioial teeth or bridge Workbeing heldthere,` f

by against ,tilting and'pivotal-"movements While, at the same` time,`jthebridge Work is so sup-ported that lthe portion 'of the'ginns vhchgit. engages SS11bjefed-fto the vproper action sof that 4the gums' are' maintained in goodeondition.

` A :E nrther'aiinrofthe invention isto provide a simple and yeffectiveatta'ehirlent-whichv may oe readily removed andrepla'oedwvhen it is'desired tofelean,l repairoi1 vperform other v necessary operations upon the applianfoef A, furthenobject of the invention is to providean attachment Whiehm'ay be readily mouth Without in Yany Way mutilatingfor damaging such teeth,l My lattaehmlentf may Vbe correctly ittedftoQteeth Which `are 'irregular orabnormally inclined. ,A lfurtheraiihi oftheinventionis topprovide an improved attachment Whihis very neatgin appearance. t

improved arrangementis su'ehthat creviees, cracks or thelikefinvvhioh `particles of ifoodor other `foreign matter" may lodgey are substantially ,eliminated,- Yand undue stress' on the permanent-teethto A vvhieh the attachment is applied'vis avoidedfAfurther object of the invention is to` provide "animp'roved: arrangementwherein the clasp orI elaspsliforming ypart of thefattaohmentfis-' notes onev 'ofzthefjavvsfofthemonthj 'Zifpejrfr permanent tooth with which itis associatedj i 1 nent 'teeth; Between.y v the fjpermanentf'teeth 5 'are'articial or" removableteethdfiXedtoa .l f

' t each fendi a held against accidental vvithdravvalffrom'the tion of the gums lyingbeneaththefplate or j'foodi nient 'taker v v Figure' lji'sa fron-U view ll shovvinga" denture;

teethyf *e fasabffdge; term is applied in @aerial-gas Wina/apartobvious: and inf Part i after:

"The invention" aeeordingly co1`1 sist`s' inA` the rfeatures of construction,loombnationof ele-VV Jorimv M.v cameo; oF1 HARTFORD,f'connnomopg' 1 Pointed," Oil? amera detail herein# 1 lkin "ents" andn arrangement of parts' Wliieh-Will `bef exemplified' vin `i the`r cons truetionherein#4 vafterf sfet""`fc `,rth, `and thejseopefof the applicapendedelaimst v g Y Injthe v'a'eoompanying dravvingsf'wherein 'I have shfovnQby jvvay of; illustration, one :eni-

Which1-` the 4"pjresent invention may forap'pliance attaohedj' to fitvvofpermanent thrionghf the through oneI arm of they clasp substantially on line'j-ifofFig "1; the orowli being shown" vin'"outlines:' 1"v ,v 1 yIn 'these{dra i v ii1gs, havefshoivn a 'bridge .Carrying fourartiieial yteeth Vand@V having l at f fea'ehend;` a olasp-res'peet-ivelyTassociatedivith A Y vtvvoj ero W'nedjpermanent teeth, biitfitLs--to i 'befunderstod Vtha'tthis showing'fis hy'vva'y Q0 Vof'`exemplie'ation"only anditfis not tohe taken as 'restric'tive'of :myfeneeptionjiti loe- "ing obvious( that `thef'fdent'nrel or' orthodontia appliance may `loe of fanydesired form' oepending 'npofn vConditions "and that" the j denture Ymayloe held in single clasp.V

"Ferl p'lirpfoses of* brevity; and Convenience in r gdeseri'p harina,

Y ap

partially encircle the crown| en the permanent, teeth; In Lthe "presentfv` instance, each clasp i'sshowntas having a pairV ofar'ms 1U, 10, adapted to closely straddle aI crown, the clasp, byjpreference'-j being madevof ai suite able resilient material so that the arms may spring slightly apart' when "slippingv Vthe clasp onto a crown or. removing, the same.

therefrom and so that the arms 'willhug the @gro @when theTl desafa a pQSitQn.- Each f clasps y, have taie.- Ofi. Wing 11 by meansof which itis secured tothe bridge offh'icoo'p'erating pioje'ctioiilllis simile i inclined. EmfthctmQrQ, the; arrengeme t 's .Sillcll i'lhattlieila" ay.- ,iliiiffi dwn on tlie'teeth'-ywith the projections ligaging, in1 the, grooves 1,2, thel advantage' offt'his being that, stress lon thepermane'nt teeth surlQHlClCL by .the Clasp S; bffkn @HQ- the bridge may resthpon thegums b'e'tween'the permanent te th whereby the? gumsv will be v upward `movement tainthe samep Ji n."gpo dE condition." 1:11; the

drawings, the. groovesz,arejsliwn, aslben'g open at their upper edges'sdthat the when in. the, pcstqii. illustra-tied; illfo' 4, maymove or s lidedownyvaigdly on, the crown.

redeemed me: foreman@limiet@ lof theleeth.y andfpi'eyents accidental',withdrawal of the crowns,` Howevevl with the. arrangement Y described; when 1t. isd bridgeythls mi i bar. bridg whereupon will cam thez arms vapa-rtfsoi th willEL slipy over these pccject-ions..y 'Bypreference, eachi arm. isi further provided with` a secondr'ecessor depression 1.5:, andfthese. de-

up on th pressions: are4 vertically. alined'or immediately beneath ,thek groovesl 12 andl are Open atthQir lower edges.; 'lhe purpose.. ofthese f depressions 15 is toffaciltate the positioning of the clasp about, the.V crowns, it. beingobserved that, nvili-e114theclasps (are moved.. down into position on the, crowns, thedepressions will be received the projectionsll so that thel clasps arevv properly .located and the PTOJ'GCQHS Will @211.11 th @rinsapeft SO? that the clasps` will, slip lover., the projections until these progecticiis are. recived'by the grooves ldor the purpose of insuring againstI tiltving or pivotal, actionE of theclasp rela-tive to theQQw-iwhich f surrounds' and; ft. the same t1me,gu1de the clasp 1n its movements clasp ha up and down on the crown, each arm of the cl l isprovided with AAa cliannelfQOfada-pted tol respectively receive or accommodate verticallv extendingY ribs 2l onr the opposite Vsides ofethecrown. .By preference, each of these channelsV is uniform throughout its .length aiidfextends from the vupper to the lower edge of, the arm in which it is located. The'rib's'l are' `-at least as long'as the channels and correspond 'in crcss section' to. the Chaim les' 'The projecties 1.3., and' the lione' proj actions vibs 2l' ofthe crowns maybe economic formed bybending the metal wn, outwardly bynieaiisof suitable I claim., as my inventionf least, of w and a` clasp having Ya pair of resilient, arms hugging said crown and 'each prgcvided with lower. edge, each t'.` its' lowerl edge rCQ'SScsbcing openja'tk itsjl'owereiicf and havl 411g. 21.1.1. inclined Wall, Sulinialyf de?,

scribed, f V y Y In combination, ar tooth element, and a Clasp. wine, a piref .a'ls Stradrdlin'g sf i A@l nicht d tooth elementandadapted to 'be slipped iiigtofandy out of place` rthereon, one

of' Ysaid* el,e1/'niente having anl elongated.'yertiu cally eiitending groove "provided-1 at' one! end with a cam surface, and thefother Vofsaid elements havingI a Vprojection vertically movable in said groove and adapted to be "decached therefrom, said( clasp havingfslidable vertical" movement; on said-*tooth element, and-said cain surface andy projection'fbeing adaptedl to'y interengageV toY lirv'nity ther Vmovement of the clasp towardsl theiipper end of the'tooth `element whereby the. clasp is held againstl accidental withdrawal.

t, ncombination,1A a.` crown having a projection `on one of its'si'dcfaces, andfahclasp havingfa pair of arms vstraddflng, andl huggingv said crown, one ofsaid arms' having a vc Lically extending groove with a' cam surface at its lower Q said projection being relatively shorter thanl said groove l'and/berie elected: tejSlidef thasiil; 'Seid Cam. Surfacebe slanted' t0 engage Said Pfie'tion and thereby prevent accidentalv wit*hdrawal having sliding movement lon the crownwith the projection engaging in said groove,

5. In combination, a crown having a projection on each of its opposite sides, and a clasp having apair of arms str-addling said crown and each provided with a groove open at its upper end-and with a camsurface at its lower end, said grooves being adapted to.` respectively receive said projections, and said clasp having movement relative to said crown with the projectionsengagingin said grooves, said arms further havingy in their lower edges and respectively` alined with said grooves -recesses adapted to respec-Vv tively accom'modateisaid` projections whenv slipping the clasp into place-'on said crown.

6. vIn combination, a toothelement having*VI aprojection on one side', and a vclasplhaving Va pairof arms straddlin'g saidtooth element, one of vsaid arms being providedv with a groove extending downwardly from the upf 'per edge of thel arm and terminating short of the lower edge thereof,the inner Vend of said groovehaving an inclined surface, said clasp having movement relative to said tooth element with the projection engaging in said groove, saidl arm further having in its lower edge and alinedwith said groove a recess adapted to accommodatesaid projection Vwhen slipping the -clasp inrplaceon said 7. Incombination, a crown havingaprojection and a rib on its sides, and' a clasp having a pair of arms straddling said Vcrown and one provided with a verticallyextending elongated groove with a cani surface vat its lower end, `one of said arnishaving a channeh said groove receiving saidprojecytion and said channel receiving said rib,and I said clasp having movement relative to said crown with the projection and 'rib respec'l,V tively engaging in said groove and channel.v

VE5. Incombination, a, crown havingv on each of two of its oppositeV sides aprojection and a relatively long vertical rib, and a clasp l lhaving a pair'oix arms sti'addling said crown i tending downwardly f roin` the upper edge or' vthe arm and terminating short Vof the* 50 andr each arm provided with'V a groove'exlower edge thereof,` the inner lendof'each groove having an inclined surface, said projectionshaving camming surfaces respectively engaging Ysaid inclinedA surfaces of i Vsa'idgrooves,each ofisaidarms also having e a channelor groove `.adapted tori'eceive a respectiverib, each of saidchannels extending `from-the upper to the lower edge of the 9. In combination, a crown having on each of two of its opposite sides approjection and a relativelyv long lverticalV rib, v and Ya clasp having ,a` pair of arms -straddling said jections having 'caiiimingy 'surfaces respectivelyengagi-ng said ,inclined surfaces of jarmin which it is located and each channelf` ,Y

corresponding -in lcrosslfsection to there# -spective riby which vit receives. 6o Y said grooves', eachof saidarmsV also'havingf Va channel or groove adapted to receiveV a Yrespective rib,each of saidchannels extend- Y ing from the upper to the lower edge ot the armfin which itis located and each chan` s nel corresponding in cross section to therespective*rib-which it receives, said `arms further havingin their' lower edges and respectively alined with said 'groovesljre kcesses'adapted 'toi'espectively accommodate '5 Y said projections when slipping the clasp into 1 place on sadcrown.,` l, e Y

10. A' clasp for attachinga bridgeto tooth and comprising a Vpai'r of resilient` Varms adapted to straddlerthe tooth and each having a groove on its. inner face openrait'f is upper end and having al cam surface .at

fits inner'end, each arm 'alsoliaving ar recess at its'lower edge and alined with arespective- E' groove. f 'y s 'i v 'l rclasp for attachinga bridge to a' tooth and Icomprising a pairfof resilient arms adaptedto straddle the tooth and veach having a groove on its inner '.face openvat its upper end and having a'camsuraceat Vits innerend, eacharm having oii'its inner `itace. a channel extending from edge toA edge JOHN M. oni/xiao. 

